Home / 739,521.85-1,020,540.12-399,990.10

Finding the Fourth Proportional to 739,521.85, 1,020,540.12 and 399,990.10

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Solution

The fourth proportional to 739,521.85, 1,020,540.12 and 399,990.10 is: 551,986.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    739,521.85 : 1,020,540.12 = 399,990.10 : x
  2. Step 2: Convert to fraction form
    739,521.85/1,020,540.12 = 399,990.10/x
  3. Step 3: Cross multiply
    739,521.85x = 1,020,540.12 × 399,990.10
  4. Step 4: Simplify right side
    739,521.85x = 408,205,944,652.81
  5. Step 5: Solve for x
    x = 408,205,944,652.81/739,521.85
  6. Step 6: Final answer
    x = 551,986.32

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.